/Engine/Source/Runtime/Engine/Classes/Sound/SoundClass.h
Get the parameters for the sound mix.
void Interpolate ( float InterpValue, [FSoundClassProperties](API\Runtime\Engine\Sound\FSoundClassProperties) & Current, const [FSoundClassProperties](API\Runtime\Engine\Sound\FSoundClassProperties) & Start, const [FSoundClassProperties](API\Runtime\Engine\Sound\FSoundClassProperties) & End )